Federer's twins on Facebook

Roger Federer posted the first public photo of his twin girls on the Internet on Friday.

"It was very funny as both girls had the hiccups while we were trying to take a decent picture," Federer wrote below the photo on his Facebook account, thanking friends and fans for their warm wishes. "The girls and mom are doing great."Federer and his wife, Mirka, are each holding one of the babies and smiling at them in the picture. Federer said it was taken by his father.

Charlene Riva and Myla Rose were born July 23 on what Federer said was the best day of his life.The 27-year-old top-ranked tennis great married Mirka in April. He announced her pregnancy in March, but it was a well-kept secret that she was expecting twins.

Federer is not scheduled to return to the ATP tour until Aug. 10 in Montreal. Mirka sat courtside this month when Federer won an epic Wimbledon final against Andy Roddick for his 15th Grand Slam title, breaking Pete Sampras' record.

Federer met Mirka in 2000 when they were competing for Switzerland at the Sydney Olympics. Mirka emigrated from Slovakia with her family to Switzerland as a child. After playing on the WTA Tour and retiring because of injury, she became one of Federer's managers.